How do I attach pulley assembly- Pictures.

[Judge]

{Edited to better state the problem, and update that I've found out more by better inspection, and reading other threads}


I just bought this 1979 300D, but I haven't driven it more than "around the block" The front pulley assembly came off.
How do I attach it.


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I'm off to the junk yards to see if I can find one, and learn by seeing one. The Car is located about twenty minutes from home.

ARE THERE ANY WRENCHS i SHOULD BE SURE TO BRING.